明末传教士熊三拔与徐光启合编《泰西水法》,西方水利机械龙尾车藉此传入中国。虽然龙尾车得到徐光启等明清士人的大力赞赏,但始终未能在中国广泛应用。文章从提水效能的角度对龙尾车的提水能力进行了理论分析,比对了龙尾车与中国传统提水机械龙骨车之间的优劣,发现龙尾车的提水能力与其形制大小密切相关,其机械效率远不如龙骨车;在明清时期的个体小农经济生产方式主导下,提水效能的不足很可能是龙尾车未能被广泛应用的重要原因之一。 The Ming Dynasty missionaries Xiong Sipu and Xu Guangqi co-edited “Tess of the Water Act,” Western water conservancy machinery tail car to pass into China. Although the tail car was Xu Guangqi and other Ming Dynasty scholars strongly appreciated, but has not been widely used in China. The article analyzes the water lifting ability of the tail car from the aspect of water efficiency and compares the advantages and disadvantages between the tail car and the Chinese traditional water lifting keel car. It is found that the water lifting capacity of the tail car and its shape Its mechanical efficiency is far less than that of keel car. Under the leading of small-scale peasant economy in the Ming and Qing Dynasties, insufficient water-lifting efficiency is probably one of the important reasons why the tail car can not be widely used.